Add option to pass in custom test suite name for Junit formatter

[astocker-scottlogic]

🤔 What's changed?

Added functionality which allows users to pass in custom test suite names for the Junit formatter

⚡️ What's your motivation?

Fixes #2265

🏷️ What kind of change is this?

• :zap: New feature (non-breaking change which adds new behaviour)

♻️ Anything particular you want feedback on?

I haven't added anything to the docs because I wasn't sure if there was a suitable place, but I am happy to write some documentation if it is needed :-). I added two unit tests, I tried to stick to the current format being used but I'm not entirely sure it's correct. Finally there is a test failing under the 16x windows build. However it seems this test has failed in other PRs so I'm not sure it's related to the changes I've added.

📋 Checklist:

• [x] I agree to respect and uphold the Cucumber Community Code of Conduct
• [x] I've changed the behavior of the code
  • [x] I have added/updated tests to cover my changes.
• [x] My change requires a change to the documentation.
  • [x] I have updated the documentation accordingly.
• [x] Users should know about my change
  • [x] I have added an entry to the "Unreleased" section of the CHANGELOG, linking to this pull request.

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[coveralls]

Coverage: 98.492% (+0.001%) from 98.49% when pulling cea9f81fa50a4198f43f54dfca73e73abc12a20d on astocker-scottlogic:astocker-2265-custom-formatting-option-junit into 63f30338e6b8dbe0b03ddd2776079a8ef44d47e2 on cucumber:main.

[aslakhellesoy]

Hi @astocker-scottlogic,

Thanks for your making your first contribution to Cucumber, and welcome to the Cucumber committers team! You can now push directly to this repo and all other repos under the cucumber organization! 🍾

In return for this generous offer we hope you will:

• ✅ Continue to use branches and pull requests. When someone on the core team approves a pull request (yours or someone else's), you're welcome to merge it yourself.
• 💚 Commit to setting a good example by following and upholding our code of conduct in your interactions with other collaborators and users.
• 💬 Join the community Slack channel to meet the rest of the team and make yourself at home.
• ℹ️ Don't feel obliged to help, just do what you can if you have the time and the energy.
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On behalf of the Cucumber core team, Aslak Hellesøy Creator of Cucumber